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wgengine/magicsock: don't report v4 localhost addresses on IPv6-only systems

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This commit is contained in:
Brad Fitzpatrick 2020-05-28 14:16:23 -07:00
parent fff062b461
commit a428656280
1 changed files with 3 additions and 2 deletions

5
wgengine/magicsock/magicsock.go

@ -547,9 +547,10 @@ func (c *Conn) determineEndpoints(ctx context.Context) (ipPorts []string, reason
return nil, nil, err
}
reason := "localAddresses"
if len(ips) == 0 {
if len(ips) == 0 && len(eps) == 0 {
// Only include loopback addresses if we have no
// interfaces at all to use as endpoints. This allows
// interfaces at all to use as endpoints and don't
// have a public IPv4 or IPv6 address. This allows
// for localhost testing when you're on a plane and
// offline, for example.
ips = loopback